Form or mold for making pontoons.



G. Y. POCOCK.

FORM 0R MOLD FOR MAKING PONTOONS.

APPLIQATION FILED APR. 10. I918- Patented Feb. 25, 1919.

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G. Y. POCOCK.

FORM 03- MOLD FOR MAKING PONTOONS.

Patented Feb. 25, 1919.

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GEORGE Y. POCOCK, OF SEATTLE, WASHINGTON, ASSIGNOR TO BOLING AIRPLANE C0,, OF SEATTLE, WASHINGTON, A CORPORATION OF WASHINGTON.

FORM OR MOLD FOR MAKING PONTOONS.

Specification of Letters Patent.

Patented Feb. 25, 1919.

Application filed April 10, 1918. Serial No. 227,831.

To all whom it mag concern:

Be it known that I, GEORGE Y. PocooK, a subject to the King of England, and resident of the city of Seattle, county of King, and State of Washington, have invented certain new and useful Improvements in Forms or Molds for Making Pontoons, of which the following is a specification.

, My invention relates to a mold or form which is intended for holding the interior frame While applying thereto the exterior skin in the manufacture of boat and pontoonlike structures. The particular structure with which the device, as herein shown, is intended to be used and which has been illustrated in the drawings, is a pontoon for use on hydroaeroplanesl It will be evident that the same form of mold may be employed for like work in manufacturing boats or pontoons intended for other uses.

The object of my invention is to provide a mold which may receive and securely hold the skeleton or interior frame of such a structure as that named, while the exterior skin is applied thereto.

One object is to provide a mold of this sort which will both hold the frame and shape the outer skin and which possesses such characteristics that it materially contributes to the speed of the work and to the accuracy of the product and is so constructed that it may be readily assembled for use and readily handled so as'to remove from it the completed pontoon or boat structure.

In the accompanying drawings I have shown the device incorporated in the type of structure which is now preferred by me, when applied to .making the particular product named.

Figure 1 is a top or plan view of the device, in' position for the reception of the frame which is to be covered.

Fig. 2 is a side elevation of the device in the same condition.

Fig. 3 is a vertical, central, longitudinal section.

Fig. 4 is a transverse section taken on the plane 4, 4, of Fig. 2.

The particular structure for which the mold, as herein shown is designed, is a pontoon having a flat bottom surface and having the remainder of the body substantially a section cut from a cylinder. In constructing this float or pontoon, an inner frame work is employed, having certain peripheral ribs, transverse bulkheads and longitudinal bars. This frame work is assembled and secured together before being brought to the mold or frame, which is the subject of this invention.

The frame of the pontoon under consideration has a central longitudinal web and truss as well as transverse bulkheads. It also has strips or bars running along its outer lower edge, these corres onding in a way to the strips which run a out the gunwale of a small boat. These strips project inward from the outer skin and have the outer skin, which is of veneer structure, secured to the outer sides thereof. It is necessary to provide a mold or form which conforms in its outer surface with the inner surface of the veneer strips from which the skin is made. It, therefore, follows that the mold must project so as to extend over these strips while the skin is being placed. It is, therefore, necessary to move'portions of the mold inward enough. to clear these strips in order to permit removal of the structure after the skin has been applied to the frame. I, therefore, construct the mold with a central section 1, which has inclined sides 10 and a central slot 11. This central slot re-' ceives the central web, or truss-like, structure of the frame.

I also employ-a series of side members, 2, 20, 21, 22 and 23, these being divided into sections and when assembled in place, sepa ,rated from each other at their ends enough to leave slots, as 6, 60, 61, 62 which are positioned and of a width to receive the trans verse frame and bulkhead members of the inner frame of the pontoon. The central section 1 is transversely slotted to correspond. The sections of the mold are also provided with grooves 7 for the reception of light ribs of the pontoon frame. These are located as may be called for by the design of the pontoon frame.

The inner edges of the side members, 2, 20, 21, 22 and 23, and the outer surface of the central member 1, are inclined, as is clearly shown at 10, in Fig. 4 and the inner central member 1 is supported in such manner that when it is desired to remove the completed structure, the central member may be dropped a distance suflicient to permit inward movement of the side members of the mold to thus permit freeing the marginal strips of the frame.

The side sections of the mold rest upon a ,plank 30 at each side of a base frame 3 and are capable of being moved inward. They are located, so far as their outward position goes, and prevented from moving too far outwardly, by means of a strip 31 which is secured to this base, or by other suitable means. Strips 24, secured to the vertical frame members 25 of the side molds, form I a rest for the outer edge members of the pontoon frame.

The side sections of the mold, consist of the vertical ribs 25, and the stave-like strips 26, which are secured thereto to form the main body of the mold. These sections, and

' in fact all parts of the mold, are provided with an exterior armored surface consisting of a sheet 27 of metal. The purpose of this is to give to the mold .an exterior surface which shall be true and smooth, and particularly, one against which nails and brads may be driven so as to automatically clench. This is a matter of great convenience as the skin is composed of plurality of thin sheets of wood which are crossed and nailed together. With an armored surface upon the mold these nails may be driven anywhere and they will be securely clenched on the inside.

The inner section 1 is normally held in its raised position, or that shown in Fig. by means of a cross-bar l2 whichis looseand so may be easily removed so as to let the central section down. When this central section is dropped the side sections may be moved inwardly enough so as to permit lifting of the completed pontoon structure.

What I ,claim as my invention is:

1. A mold for use in constructing boatlike structures, having an armored outer surface conforming in shape with the shape of the inner surface of the skin of the boat 45 and having slots therein adapted to receive the parts of the frame of the boat.

2. A mold for use in applying an outer skin to a frame in boat-like structures, comprising a mold having slots therein to receive the frame and having an armored outer surface, said mold having a member movable to permit collapsing of the other members to permit removal of the finished structure.

3. A mold for use in applying outer skins to the frames of pontoon-like structures,

comprising a longitudinally extendingcelr tral mold and a series of side molds, said molds being spaced apart and slotted to receive the skeleton frame, a supporting and registering base for said molds, and means for first Withdrawing the central mold.

4. A mold for use in applying the outer skin to a frame structure comprisinga central mold having inclined sides and a series of side molds engaging said inclined sides, the ends of said side molds being separated, and the central mold being transversely slotted to provide openings for the reception of transversely extending parts of the assembled frame, and means for dropping the central mold to thereby permit inward move ment of the side sections.

5. A mold for use in applying the outer skin to a frame structure comprising a central mold having inclined sidesand a series of side molds engaging said inclined sides," the ends of said molds being transversely slotted to provide openings for the reception of transversely extending parts of the assem-' bled frame, an armored skin on the exterior surfaces of said molds, and means for drop ping the central mold to thereby permit inward movement of the side sections.

6. .A mold for use in applying the outer skin to a frame structure comprising a cenas tral mold having inclined sides and a series of side molds engaging said inclined sides, the ends of said side molds being separated and the central mold being transversely slotted to provide openings for the reception 9c of transversely extending parts of the assembled frame, and the central mold being slotted lengthwise to receive a longitudinal Web of said frame, and means for dropping the central mold to permit inward movement '95 of the side molds.

7. A mold for use in applying the outer skins to the frames. of pontoon-like structures, comprising a supporting and registering base, a vertically movable central mold we and sectional side molds movable toward and from .the central plane, said molds being slotted and spaced apart to receive the frame work of the pontoon and the side sections being movable toward the center when the m5? central section is lowered.

'Signed at Seattle, Washington, day of March, 1918.

this 30th GEORGE Y. POCOCK.

It is hereby certified that the assignee in Letters Patent No. 1,295,202, granted February 25, 1919, upon the application of George Y. Pocock, of Seattle, Washington, for an improvement in Forms or Molds for Making Pontoons, was

erroneously described and specified as Boling Airplane 60., whereas said assignee should have been described and specified as Boeing Airplane 00., as shown by the records of assignments in this office; and that the said Letters Patent should be read With this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 21st day of October, A. D., 1919.

[REAL] M. H. COULSTON,

Acting Commissioner of Patents. 01. 965. 

